EP 1011114 A4 20010919 - HEXAGONAL FERRITE MAGNET
Title (en)
HEXAGONAL FERRITE MAGNET
Title (de)
MAGNET AUS HEXAGONALEN FERRIT
Title (fr)
AIMANT HEXAGONAL EN FERRITE
Publication
Application
Priority
- JP 9901411 W 19990319
- JP 19495198 A 19980625
Abstract (en)
[origin: EP1011114A1] An object of the invention is to simultaneously increase the saturation magnetization and magnetic anisotropy of M type ferrite, thereby realizing a hexagonal ferrite magnet having a high remanence and high coercivity which could never be achieved in prior art M type hexagonal ferrite magnets. The object is attained by a hexagonal ferrite magnet comprising A, R, and Fe, wherein A represents at least one element selected from among Sr, Ba, and Ca, and R represents an element capable of assuming a valence of +3 or +4 and having an ionic radius of at least 1.00 angstrom, and n/N is up to 0.35 provided that N is the total number of crystal grains and n is the number of crystal grains having stacking faults. <IMAGE>
IPC 1-7
IPC 8 full level
C04B 35/26 (2006.01); H01F 1/10 (2006.01)
CPC (source: EP US)
C04B 35/2633 (2013.01 - EP US); C04B 35/2641 (2013.01 - EP US); H01F 1/10 (2013.01 - EP US)
Citation (search report)
- [E] EP 0964411 A1 19991215 - HITACHI METALS LTD [JP]
- [X] WO 9825278 A1 19980611 - TDK CORP [JP] & EP 0884740 A1 19981216 - TDK CORP [JP]
- See references of WO 9967795A1
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 1011114 A1 20000621; EP 1011114 A4 20010919; CN 1273675 A 20001115; CN 1327458 C 20070718; CN 1658340 A 20050824; HK 1031781 A1 20010622; US 6248253 B1 20010619; WO 9967795 A1 19991229
DOCDB simple family (application)
EP 99909276 A 19990319; CN 200510006196 A 19990319; CN 99801018 A 19990319; HK 01102150 A 20010326; JP 9901411 W 19990319; US 27233899 A 19990319